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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2015

Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering

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Abstract

We explored by electronic Raman scattering the superconducting state of Bi-2212 single crystal by performing a fine tuned doping study. We found three distinct energy scales in A1g, B1g and B2g symmetries which show three distinct doping dependencies. Above p=0.22 the three energies merge, below p=0.12, the A1g scale is no more detectable while the B1g and B2g scales become constant in energy. In between, the A1g and B1g scales increase monotonically with under-doping while the B2g one exhibits a maximum at p=0.16. The three superconducting energy scales appear to be an universal feature of hole-doped cuprates. We propose that the non trivial doping dependence of the three scales originates from Fermi surface topology changes and reveals competing orders inside the superconducting dome.

Dates and versions

cea-01349758 , version 1 (28-07-2016)

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Cite

S. Benhabib, Y. Gallais, M. Cazayous, M. -A. Measson, R. D. Zhong, et al.. Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, ⟨10.1103/PhysRevB.92.134502⟩. ⟨cea-01349758⟩
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